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IBM C1000-059 - IBM AI Enterprise Workflow V1 Data Science Specialist

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Total 62 questions

A data analyst creates a term-document matrix for the following sentence: I saw a cat, a dog and another cat.

Assuming they used a binary vectorizer, what is the resulting weight for the word cat?

A.

0

B.

1

C.

3

D.

2

In a hyperparameter search, whether a single model is trained or a lot of models are trained in parallel is largely determined by?

A.

The number of hyperparameters you have to tune.

B.

The presence of local minima in your neural network.

C.

The amount of computational power you can access.

D.

Whether you use batch or mini-batch optimization.

The formula for recall is given by (True Positives) / (True Positives + False Negatives). What is the recall for this example?

A.

0.2

B.

0.25

C.

0.5

D.

0.33

What are three elements that are typically part of a machine learning pipeline in scikit-learn or pyspark? (Choose three.)

A.

model building

B.

data preprocessing

C.

model prediction

D.

business understanding

E.

use case selection

F.

data exploration

Which two statements are correct about deploying machine learning models? (Choose two.)

A.

It allows integration within business applications.

B.

It makes it possible to create reports for management dynamically using specific parameters from executives.

C.

It is critical for achieving high accuracy in training.

D.

It is a necessary step in training and evaluating the performance of the models.

E.

It is only possible on the cloud because they require a large amount of compute resources.

Which algorithm is best suited if a client needs full explainability of the machine learning model?

A.

decision tree

B.

logistic regression

C.

support vector machine (SVM)

D.

recurrent neural network

What is the first step in creating a custom model in Watson Visual Recognition service?

A.

Test the newly trained model.

B.

Document the errors from the built in models.

C.

Obtain image files containing objects to be classified and organize them into classes.

D.

Use IBM SPSS to create new machine learning classifiers.

With the help of AI algorithms, which type of analytics can help organizations make decisions based on facts and probability-weighted projections?

A.

prescriptive analytics

B.

cognitive analytics

C.

predictive analytics

D.

descriptive analytics

What is the meaning of "deep" in deep learning?

A.

To go deep into the loss function landscape.

B.

The higher the number of machine learning algorithms that can be applied, the deeper is the learning.

C.

A kind of deeper understanding achieved by any approach taken.

D.

It indicates the many layers contributing to a model of the data.

Which test is applied to determine the relationship between two categorical variables?

A.

paired t-test

B.

chi squared test

C.

z test

D.

t-test